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Finding the Fourth Proportional to 279,061.40, 418,721.70 and 146,091.80

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Solution

The fourth proportional to 279,061.40, 418,721.70 and 146,091.80 is: 219,205.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,061.40 : 418,721.70 = 146,091.80 : x
  2. Step 2: Convert to fraction form
    279,061.40/418,721.70 = 146,091.80/x
  3. Step 3: Cross multiply
    279,061.40x = 418,721.70 × 146,091.80
  4. Step 4: Simplify right side
    279,061.40x = 61,171,806,852.06
  5. Step 5: Solve for x
    x = 61,171,806,852.06/279,061.40
  6. Step 6: Final answer
    x = 219,205.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.